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1 <br /> Entech Analytical Labs,Inc. 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94086 <br /> ' QUALPTY CONTROL RESULTS SUMMARY <br /> METHOD Gas Chromatography <br /> QC Batch# GBG2981002 Date Analyzed 10/02/98 <br /> Matrix Water Quality Control Sample E17559 <br /> Units u <br /> ' ARAMETER Method# MB SA SR SP SP SPD SPD RPD QC LIMITS <br /> u u u u %R u %R RPD I °/.R <br /> iBenzene 1 8020 -e0 50 i 40 i ND i 38 E 95 i 37 : 93 14 i 25 i 78-112 i <br /> Toluene 8020 <0 50 40 ND 38 } 95 38 ; 96 03 25 79-111 <br /> :Ethyl Benzene 8020 <0 50 40 ND 41 103 41 E 103 0 1 i 25 79-114 <br /> (Xylenes 1 8020 1 <0 50 1 120 1 ND 1 129 1 108 1 129 1 108 1 00 1 25 t 79-115 1 <br /> :Gasoline 8015 : <50 0 : 1000 t ND : 1030 i 103 ' 920 i 92 : 113 25 F 64-125 <br /> Note LCS and LCSD results reported for the following Parameters <br /> Gasoline <br /> w <br /> Acceptable LCS and LCSD results are reported when matrez interferences cause MS and MSD results to fall outside <br /> established QC limits <br /> Definition of Terms <br /> na Not Analyzed in QC batch <br /> MB Method Blank <br /> ' SA Spike Added <br /> SR Sample Result <br /> RPD(%) Duplicate Analysis-ReIative Percent Difference <br /> SP Spike Result <br /> SP(%R) Spike%Recovery <br /> SPD Spike Duplicate Result <br /> ' SPD(%R) Spike%Recovery <br /> NC Not Calculated <br /> 1 <br />